Abstract

3613 Background: Antiangiogenic therapy has shown benefit in metastatic colorectal cancer. However, the role of apatinib in adjuvant treatment of stage IIIB and IIIC colorectal cancer remains unclear. Methods: Patients received modified FOLFOX6 once every 2 weeks for a 6-month period (control group) or modified FOLFOX6 for 6 months plus apatinib (500mg) once a day for a 12-month period (experimental group). Progression free survival (PFS), overal survival (OS) and treatment-related adverse events were evaluated in two groups. Results: 63 patients have been enrolled in this study. This trial reported a 3-year PFS of 74.2% for modified FOLFOX6 plus apatinib vs. 61.5% for modified FOLFOX6 ( P< 0.05). 5-year OS was significantly improved in the experimental group compared with the control group (86.3% vs. 72.5%; P< 0.05). The most common grade 3 adverse events were hypertension and hand–foot syndrome. No treatment-related grade 4 adverse events or treatment-related deaths were observed. Conclusions: Apatinib can prolong PFS and OS when added to adjuvant chemotherapy in resected stage IIIB and IIIC colorectal cancer. The toxicities associated with apatinib were generally acceptable. Clinical trial information: NCT03365765 .

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